Selfishness beats altruism within groups. Altruistic groups beat selfish groups. Everything else is commentary.
David Sloan Wilson and E.O. Wilson, from their paper, “Rethinking the Theoretical Foundation of Sociobiology.”
David Sloan Wilson is an American evolutionary biologist, son of novelist Sloan Wilson [of a previous Quote of the Day], and author of, The Neighborhood Project: Using Evolution to Improve My City, One Block at a Time.